345145739 has 4 divisors (see below), whose sum is σ = 345189624. Its totient is φ = 345101856.

The previous prime is 345145729. The next prime is 345145753. The reversal of 345145739 is 937541543.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345145739 is a prime.

It is a super-2 number, since 2×345145739² = 238251162299712242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 345145696 and 345145705.

It is not an unprimeable number, because it can be changed into a prime (345145709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6542 + ... + 27075.

It is an arithmetic number, because the mean of its divisors is an integer number (86297406).

Almost surely, 2^345145739 is an apocalyptic number.

345145739 is a deficient number, since it is larger than the sum of its proper divisors (43885).

345145739 is a wasteful number, since it uses less digits than its factorization.

345145739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43884.

The product of its digits is 226800, while the sum is 41.

The square root of 345145739 is about 18578.0983687782. The cubic root of 345145739 is about 701.4566530945.

The spelling of 345145739 in words is "three hundred forty-five million, one hundred forty-five thousand, seven hundred thirty-nine".